如何在WPF中移动焦点？ [英] How to move focus in WPF?

问题描述

我不知道是否有改变从当前控件的焦点，并将其移动到TabIndex分配控件的WPF中的其他控件。

示例
I有一个TabIndex 1到5的控件，有没有办法让焦点从1到5？

 < TextBox TabIndex = 1Focusable =trueLostFocus =test_LostFocus/> 
< TextBox TabIndex =2Focusable =true/> 
 ... 
< TextBox TabIndex =5Focusable =truename =LastControl/> 
  

。

  private void test_LostFocus（object sender，RoutedEventArgs e）
 {
 LastControl.Focus（）; 
 
 
 
 $ b我尝试了 Keyboard.Focus（）和 FocusManager.SetFocusedElement（）但没有运气。 
 
 
有什么想法吗？
 $只需处理文本框的 KeyDown 事件并在那里设置焦点。既然你使用 Tab ，让控件知道你将通过设置 e.Handled = true 来处理它，这将停止使用下一个 TabIndex 跳转到控件的默认选项卡。 b 
 
  private void tb_KeyDown（object sender，KeyEventArgs e）
 {
 if（e.Key == Key.Tab）
 {
 e.Handled = true; 
 LastControl.Focus（）; 
} 
} 
  
 
I wonder if there is anyway to change focus from the current control and move it to other control in WPF on TabIndex assigned controls.

Example
I have controls with TabIndex 1 to 5, is there a way to jumb the focus from 1 to 5 ?
<TextBox TabIndex="1" Focusable = "true" LostFocus="test_LostFocus"/>
<TextBox TabIndex="2" Focusable = "true"/>
...
<TextBox TabIndex="5" Focusable = "true" name="LastControl"/>
. 
private void test_LostFocus(object sender, RoutedEventArgs e)
{
  LastControl.Focus();
}
I tried  Keyboard.Focus() and FocusManager.SetFocusedElement() but no luck.

Any idea?
解决方案
Simply handle the KeyDown event for the textboxes and set focus there. Since you're using Tab, let the control know you'll handle it by setting e.Handled = true, which will stop the default tab action of jumping to the control with the next TabIndex.
private void tb_KeyDown(object sender, KeyEventArgs e)
{
    if (e.Key == Key.Tab)
    {
        e.Handled = true;
        LastControl.Focus();
    }
}


                        
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